Liquid-fuel-feeding device



June 16, 1925.

Filed April 17, 1924 Ja -Q: 2.

4 a 6 7E5 9 v 1 j l 3 m r 7 5 M m 6 g 3 P w j a 1 J m u 7 Patented June 16, 1925.

UNITED STATES,- PATENT OFFICE.

JOHN SOHIENEINGER, JR, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO AETNA AUTOMATIC OIL BURNER, INCORPORATED, 03'! NEW YORK, N. Y., A. CORPORATION OF NEW YORK.

LIQUID -FUEL-FEEDING DEVICE.

Application filed April 17, 1924. Serial No. 707,268.

I, To all whom it may concern:

Be it known that I, JOHN SCHEMINGER',

J r., a, citizen of the United States, residing 1 construction especially designedand adapt ed to be used in connection with pump-fed rotary oil. burners, for feeding the liquid fuel in such manner that a portion thereof sufficient to maintain combustion is separated from the major portion and delivered to the burner unaffected to any appreciable extent by agitation or the pulsations of the pump, while the surplus or major portion is returned to the suppl tank.

In the operation 0 pump-fed rotary 011 burners, when the liquid fuel is conducted direct from the pump to the burner, the

agitation pulsatory action produced by the pump piston on the moving column of liquid seriously interferes with the opera;

tion of the burner, resulting at times in extinguishing the flame. I

ne object of my invention is to overc me this difficulty and provide simple and eflicient means for effecting a steady and uniform feed or flow ofthe liquid fuel from a pump to the burner, or other device with which the invention may be used, unaffected to any appreciable extent by the pulsations 40 of the pump, as in pump-fed liquid fuel burners as heretofore ordinarily construct e r 7 y Another objectJof the invention is to pro;

vide a; simple .andeificient device ofithe char:

ractergreferred to; interposed the; ipe line :i'betweem the ,1 pump :amr the-human or; feed dng liquid fuel'ainisubhiimanner. as towcrea te fuel in .the-':feed 'ip'e in: the-.manner.set forth inmyzPatentk obi-#425785, dated-January feeding; neansgawithout'; rendeping itihawszdescribed in said patent;

Other objects, of the invention are to provide a device of the character referred to for effecting 'a separation of the oil in the manner set forth in my aforesaid patent, and in which the back pressure required to drive the fuel oil to the burner is developed within the device itself, thus eliminating the vertical liquid column heretofore used to create such pressure, and which, when thrown out of operation, will automatically and posi tively close the feed outlet to the burner, and which also enables the pressure in the feed line to beincreased or decreased at will by means of interchangeable springs of different strengths.

The invention will first be hereinafter more particularly described with reference to the accompanying drawings, which are to be taken as a part of this specification, and then pointed out in the claims at the end of the description.

,In said drawings, Fig. 1 is a central vertical sectional elevation of a liquid fuel feeding device embodying my invention; showing the valve mechanism in closed position; Fig. 2 is a view similar to Fig. 1; showingthe valves open; and

' Fig. 3 is a transverse taken" on the line 33 of Fig. 1, looking downward. i The valve casing 1 is preferably of cylindrical form, as shown, open at its upper horizontal section s end and provided with a base-portion 2, for

attachment to 'a supporting base; said baseportion having a clean-out opening therein,

closed by a removable plug 4, to permit cleansing the oil chamber 5 at the bottom of the-casing.' vWithin the casing there. is a valvejchamber-in which is placed a verti cally movablevalve 6 "of disk-like form, which isnormally held by gravity in closed position slightly above the liquid supply pipe 7, leading fronr the pump (not shown) i o the c s ga d. is pr ide w th a -=de+ pe ing.- :s eml iw hi Pas s -'t r .iiglma central, operas n a! gu de plate 8,-@. fixed Wi in t ei asing a. rovi j d Witha phir lityt penings V ma sed ,In above into the liquid zspace be:- d betwe n; ai gu de'ph eanda disk; supporting} plate 11 {which is othenwise firmly ;S }0\l1e,d:Wii3hlfi g and -tgadapted (to lie-closed by 1 rid -13 of thei'valve. steinthroug :W Ch a Oil provided.-. with a: central -15;

'- seated upon the support directly over the burner practically said port 11. The bore of the casing is reduced below the plate 10 so as to form a shoulder upon which said plate may rest.

The port 11 opens into the oil chamber 5' which is in communication with an oil feed pipe 14 leading to the burner. The disk valve 6 serves to close the valve chamber above the liquid fuel supply pipe 7 and is pressed downwardly by a spring 15 placed between said valve 6 and the cover plate or top 16 of the casing, which is removably secured by set screws or the like, as shown, in order to permit the removal of the spring and the substitution of a stronger or weaker spring, as desired, to increase or decrease the pressure on the valve 6. The spring 15 is adapted in operation to exert pressure opposed to the pressure of the liquid forced into the casing or valve chamber by the pump to a greater or less degree, accbrding to the strength of the spring used, and will yield to greater pressure exerted by the pump when the latter is in motion so as to permit thevalve to open. The spring tends to hold the valves 6 and 13 normally in their lowermost positions, in which the valves are closed, and serves to. close the valves quickly when the pump is stopped, the spring itself being held under pressure between the valve 6 and the cover plate or cap 16. The upper portion of the bore of the valve casing through which the upper endof the spring passes is enlarged as shown in Fig. 1 to permit a free passage of oil around the spring and out through a surplus oil return pipe 17 leading from the valvecasmg to a storage tank or the oil reservoir from which the fuel supply is drawn by the pump.

In operation, liquid fuel is drawn by the pump from a supply tank or reservoir (not shown) and forced through the pipe 7 into the valve casing, filling the oil chamber above and below the guide-plate 8, through the holes 9 in the latter, and when sufiicient pressure has ,been developed the valve plate 6 is raised and with it the valve 12 to the "posit on shown-in Fig. 2 of the drawing,

whereuppn a portion of the liquid will pass through'the port 11 into the oil chamber 5 and out through the feed pipe 14 to the burner, while the major portion or surplus fuel which is not needed to supply the burner, and which is directly agitated by the pulsations of the pump, will'pass up and out through a by-pass 18 into the pipe 17 and thence back to the storage tank, while the lesserportion of fuel under fluid-pressure produced'by the pump in opposition to-the ressure of, the spring 15 is forced mto an through the fuel feed-pipe to the burner. By these means oilis delivered to free from agitation caused by the pulsations of the pump, and

under a pressure that may be quite accurately predetermined by the strength of the spring used to oppose the pressure exerted by the pump, the pressure exerted being greater or less according to the strength of the spring and the speed at which the pump is operated. To facilitate the return of the valve to a closed position when the pump is stopped, the valve plate 6 has a small hole or vent 6 formed therein through which oil ma escape through the iston valve, which is forced downwardly y the pressure of the spring to its lowermost tion, as shown in Fig. 1.

It is understood, of course, that minor changes may be made in the details and arrangement of parts without departing from the spirit and scope of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is:

1. A liquid fuel feeding device comprising a casing having a differential bore, reduced in size at the lower end thereof, a piston valve slidably fitted in said bore and carrying a depending valve stem which passes through a partition or guide-plate secured within the casing so as to divide the oil space or chamber below said valve into upper and lower compartments, said guideplate having a liquid fuel passage therethrough into the lower, compartment, a

spring interposed between said valve and the top of the casing and tending to normally hold said valve in closed position, a fuel supply pipe leading into said upper compartment, a partition plate within said casing below said guide-plate having an opening or discharge port therethrough on which the free end of said valve stem may be seated to close said port, a fuel feed-pipe connecting said discharge port with a burner or otherdevicefor supplying oil thereto, and a discharge pipe at the upper end of the casing through which surplus fuel may be returned to the supply tank.

2. A liquid fuel feeding device comprising an upright substantially cylindrical casing having a differential bore of reduced size at its lower end, a piston valve slidably fitted in said bore, a spring interposed between said valve and the top of the casing and tending to normally hold the valve in closed position, a guide-plate secured within the casing below said valve so as to divide the interior of the easing into upper and lower compartments, said guide-plate having a plurality of restricted liquid fuel passages therethrough into the lower compartment, and a central opening through which passes a valve stem carried by said valve, a. fuel supply pi e leading into said upper compartment elow said valve, an oil chamber within the reduced portion of said casing at the lower end thereof 'belowsaid guide-plate,

a partition plate withinsaid casing between said guide-plate and said oil chamber and having a central opening therethrough forming an outlet which is normally closed by the free end of said valve stem, a fuel feedpipe leading from said oil chamber to a burner or other device for supplying oil thereto, and a discharge pipe at the upper end of the casing through which surplus fuel may be returned to the supply tank.

3. In a device of the character described,

a substantially cylindrical casing having a piston valve slidably fitted therein, said valve having a stem passing downwardly through a uide-plate secured within the casing and dividing the interior thereof below said valve into upper and lower compartments, .said fuel passage therethrou compartment, a fuel supp y pipe leadin into said upper compartment below said valve, a partition plate within said casing below said guide-plate having a central opening therethrough and providing a valve seat for the free end of said valve stem, whereby said opening is normally closed, a fuel feed-pipe below said valve seat leading to a burner or 11 into the lower other device for supplying oil thereto, a discharge pipe at the upper end'of the casing through which surplus fuel may be returned to the supply tank, and a spring interposed between the first named valve and the top of the casing and tending normally to hold both valves in closed position.

4:. A' device of the character described comprising a casing provided with a valvechamber having a vertically movable valve therein, a liquid fuel supply pipe leading into .said casing at one side of said valve, a surplus fuel dischar e pipe at the other side of said valve, said chamber having an apertured partition therein arranged to provide a fuel receiving compartment at one side thereof and a fuel delivery compartment at the other side, and said valve having a stem which protrudes through said partition into said delivery compartment, the latter com partment having a bottom plate provided with an outlet port upon which the free end of said valve stem is adapted to be seated so as to normally close said port, a feed pipe in guide-plate having a liquid said casing through which a portion of the liquid entering said chamber may be forced out, and pressure-applying means acting on said valve in opposition to the pressure of the liquid entering the casing through said supply pipe, whereby a portion of the liquid fuel entering said valve chamber is forced out through said feed pipe while the larger portion or surplus fuel is discharged through said surplus fuel discharge pipe.

5. A device of the character described comprising an oblong vertically disposed casing of substantially cylindrical form provided with a valve-chamber having a vertically movable valve therein, and a liquid fuel space above said valve, a liquid fuel supply pipe leading into said casing at one side of said valve, a surplus fuel discharge pipe at the other side of said valve leading from said fuel space, said chamber having an apertured partition therein arranged to rovide a fuel receiving compartment at one side thereof and a fuel delivery compartment at the other side, and said valve having a stem which protrudes through said partition into said delivery compartment, the latter compartment having a bottom plate provided with an outlet port upon which the free end of said valve stem is adapted to be seated so as to normally close said port, a liquid fuel settling chamber being provided between said bottom plate and the lower end of the casing, a fuel feed pipe leading from said settling chamber through which a portion of the liquid entering said valve chamber may be forced out, and pressure-applying means acting on said valve in opposition to the pressure of the l1qu1d entering the casing through said supply pipe, whereby a portion of the liquid fuel entering said valve chamber is forced out through. said feed pipe while the larger portion or surplus fuel is discharged through. said surplus fuel discharge'pipe.

In testimony whereof I affix my signature in the presence of two witnesses.

- JOHN SCHEMINGER, JR.

Witnesses:

B. M. Orrn'rr, THOMAS F. BURKE. 

